Comment 2 for bug 1750210

The Hotcue images on 1-4 are leftover from Mixxx 1.10. Back than we displayed only 4 hotcues by default on a a fixed sized waveform.
You can customize the display of images for hotcues using the <Pixmap> key, see https://mixxx.org/wiki/doku.php/creating_skins#waveform

+ 1 for removing the images, also because they do not scale on waveform resize.